中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | 5-[[Tert-butyl(dimethyl)silyl]oxymethyl]-2,6,6-trimethylcyclohexene-1-carbaldehyde | 174788-18-2 | C17H32O2Si | 296.525 |
—— | 1-Acetoxymethyl-5-hydroxymethyl-2,6,6-trimethylcyclohex-1-ene | 216978-34-6 | C13H22O3 | 226.316 |
—— | 4-(tert-Butyl-dimethyl-silanyloxymethyl)-3-methyl-cyclohex-2-enone | 117106-83-9 | C14H26O2Si | 254.445 |
中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | 5-[[Tert-butyl(dimethyl)silyl]oxymethyl]-2,6,6-trimethylcyclohexene-1-carbaldehyde | 174788-18-2 | C17H32O2Si | 296.525 |
—— | (E)-5-tert-butyldimethylsiloxymethyl-1-<2-(1-methyl-2,5-cyclohexadien-1-yl)-ethen-1-yl>-2,6,6-trimethyl-1-cyclohexene | 171504-38-4 | C25H42OSi | 386.693 |
—— | (Z)-5-tert-Butyldimethylsilyloxymethyl-1-[2-(1-methylcyclohexa-2,5-dien-1-yl)ethenyl]-2,6,6-trimethylcyclohex-1-ene | 318949-70-1 | C25H42OSi | 386.693 |
—— | 5-tert-butyldimethylsiloxymethyl-1-phenylthiomethyl-2,6,6-trimethyl-1-cyclohexene | 171504-25-9 | C23H38OSSi | 390.706 |
—— | 5-tert-butyldimethylsiloxymethyl-1-phenylsulfonylmethyl-2,6,6-trimethyl-1-cyclohexene | 171504-26-0 | C23H38O3SSi | 422.704 |
—— | 1-[5-[[Tert-butyl(dimethyl)silyl]oxymethyl]-2,6,6-trimethylcyclohexen-1-yl]-6-[tert-butyl(diphenyl)silyl]oxy-3-methylidenehexan-1-ol | 216978-36-8 | C39H62O3Si2 | 635.09 |
—— | (Z)-5-Hydroxymethyl-1-[2-(1-methylcyclohexa-2,5-dien-1-yl)ethenyl]-2,6,6-trimethylcyclohex-1-ene | 318949-71-2 | C19H28O | 272.431 |
—— | {2,2,4-Trimethyl-3-[(E)-2-(1-methyl-cyclohexa-2,5-dienyl)-vinyl]-cyclohex-3-enyl}-methanol | 318949-75-6 | C19H28O | 272.431 |
A cycloaddition approach to the functionalized tricyclo[9.3.1.03,8]pentadecene skeleton contained in Taxol® is described. The cyclohexenone 13 was converted as illustrated to the nitrile-aldehyde 24 to which the diene and acetylenic side chains were attached by sequential nucleophilic additions. Removal of the trimethylsilyl protecting group and Dess–Martin oxidation afforded the triene 35. Microwave-assisted thermal cyclization stereoselectively generated the tricyclic ketone 36 whose structure was further established by conversion to the aromatic system 37 upon treatment with 2,3-dichloro-5,6-dicyano-1,4-benzoquinone (DDQ). An epoxidation sequence was developed to introduce the epimeric C13 alcohol 47 as required for this cycloaddition strategy. Alternatively, an allylic oxidation (CrO3, 3,5-dimethylpyrazole) afforded the C13 ketone 49. Keywords: Taxol®, Diels–Alder, synthesis, diterpene, alkaloid.